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IPC 7
B21C-B21C05100

SECTION B – PERFORMING OPERATIONS; TRANSPORTING


B 21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL (casting, powder metallurgy B22; shearing B23D; working of metal by the action of a high concentration of electric current B23H; soldering, welding, flame-cutting B23K; other working of metal B23P; punching sheet material in general B26F; processes for changing of physical properties of metals C21D, C22F; electroforming C25D 1/00)


B 21 CMANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL


Subclass Index

METAL DRAWING 

General methods 

B21C 1/00 

Auxiliary operations 

B21C 5/00, B21C 9/00 

Equipment 

B21C 3/00, B21C 19/00 

METAL EXTRUDING 

General methods 

B21C 23/00 

Auxiliary operations 

B21C 29/00, B21C 33/00, B21C 35/00 

Equipment 

B21C 25/00, B21C 26/00, B21C 27/00 

Control 

B21C 31/00 

DETAILS COMMON TO DRAWING AND EXTRUDING OF METAL 

B21C 43/00 

MANUFACTURING NOT OTHERWISE PROVIDED FOR 

B21C 37/00 

AUXILIARY AND ANCILLARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL 

Reeling 

B21C 47/00 

Other auxiliary operations 

B21C 45/00, B21C 51/00 

Auxiliary equipment 

B21C 19/00, B21C 49/00 



Metal drawing (continuous casting B22D 11/00; pressure welding by means of a rolling mill B23K 20/04)


1/

00Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing

1/

02.Drawing metal wire or like flexible metallic material by drawing machines or apparatus in which the drawing action is effected by drums

1/

04..with two or more dies operating in series

1/

06...in which the material slips on the drums

1/

08...in which the material does not slip on the drums

1/

10....with accumulation of material between consecutively-arranged dies

1/

12..Regulating or controlling speed of drawing drums, e.g. to influence tension; Drives; Stop or relief mechanisms (couplings for drums B21C 1/14; design or construction of electrical equipment, see the relevant classes)

1/

14..Drums, e.g. capstans (capstans or winches in general B66D); Connection of grippers thereto; Grippers specially adapted for drawing machines or apparatus of the drum type; Couplings specially adapted for these drums

1/

16.Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes

1/

18..from stock of limited length (B21C 1/22 takes precedence)

1/

20..from stock of essentially unlimited length (B21C 1/22 takes precedence)

1/

22..specially adapted for making tubular articles (bending sheet metal into tubular form by drawing B21D 5/10)

1/

24...by means of mandrels (mandrels B21C 3/16)

1/

26....Push-bench drawing

1/

27..Carriages; Drives

1/

28...Carriages; Connections of grippers thereto; Grippers (for drawing machines of the drum type B21C 1/14)

1/

30...Drives, e.g. carriage-traversing mechanisms; Driving elements, e.g. drawing chains; Controlling the drive

1/

32..Feeding or discharging the material or mandrels

1/

34..Guiding or supporting the material or mandrels


3/

00Profiling tools for metal drawing; Combinations of dies and mandrels

3/

02.Dies; Selection of material therefor; Cleaning thereof

3/

04..with non-adjustable section (B21C 3/08 takes precedence)

3/

06..with adjustable section (B21C 3/08 takes precedence)

3/

08..with section defined by rollers, balls, or the like

3/

10..with hydraulic forces acting immediately on work

3/

12..Die holders; Rotating dies

3/

14...Die holders combined with devices for guiding the drawing material or combined with devices for cooling, heating, or lubricating

3/

16.Mandrels (separating mandrels from work B21C 45/00); Mounting or adjusting same

3/

18.Making tools by operations not covered by a single other subclass; Repairing


5/

00Pointing; Push-pointing


9/

00Cooling, heating or lubricating drawing material (B21C 3/14 takes precedence)

9/

02.Selection of compositions therefor



19/

00Devices for straightening wire or like work combined with or specially adapted for use in connection with drawing or winding machines or apparatus


Metal extruding (continuous casting B22D 11/00)


23/

00Extruding metal; Impact extrusion

23/

01.starting from material of particular form or shape, e.g. mechanically pre-treated (B21C 23/22 takes precedence; heat treatment or combinations thereof with mechanical treatments, see appropriate classes)

23/

02.Making uncoated products

23/

03..by both direct and backward extrusion

23/

04..by direct extrusion

23/

06...Making sheets

23/

08...Making wire, bars, tubes

23/

10....Making finned tubes

23/

12....Extruding bent tubes or rods

23/

14...Making other products

23/

16....Making turbo blades or propellers

23/

18..by impact extrusion  [2]

23/

20..by backward extrusion

23/

21.Presses specially adapted for extruding metal (extrusion presses in general B30B 11/22)

23/

22.Making metal-coated products; Making products from two or more metals

23/

24..Covering indefinite lengths of metal or non-metal material with a metal coating

23/

26...Applying metal coats to cables, e.g. to insulated electric cables

23/

28....on intermittently-operating extrusion presses

23/

30....on continuously-operating extrusion presses

23/

32.Lubrication of metal being extruded or of dies, or the like, e.g. physical state of lubricant, location where lubricant is applied (chemical composition, see appropriate classes)


25/

00Profiling tools for metal extruding

25/

02.Dies

25/

04.Mandrels

25/

06.Press heads, dies, or mandrels for coating work

25/

08.Dies or mandrels with section variable during extruding, e. g for making tapered work; Controlling variation

25/

10.Making tools by operations not covered by a single other subclass


26/

00Rams or plungers; Discs therefor  [2]


27/

00Containers for metal to be extruded (B21C 29/02 takes precedence)

27/

02.for making coated work

27/

04.Venting metal-container chamber


29/

00Cooling or heating work or parts of the extrusion press

29/

02.of containers for metal to be extruded

29/

04.of press heads, dies, or mandrels


31/

00Control devices, e.g. for regulating the pressing speed or temperature of metal (B21C 25/08 takes precedence); Measuring devices, e.g. for temperature of metal, combined with or specially adapted for use in connection with extrusion presses (measuring devices of more general interest within subclass B21C, see group B21C 51/00)


33/

00Feeding extrusion presses with metal to be extruded

33/

02.the metal being in liquid form


35/

00Removing work or waste from extruding presses; Drawing-off extruded work (in connection with the extruding of bent tubes or rods B21C 23/12); Cleaning dies, ducts, containers, or mandrels  [2]

35/

02.Removing or drawing-off work

35/

03..Straightening the work (metal straightening in general B21D)

35/

04.Cutting-off or removing waste

35/

06.Cleaning dies, ducts, containers or mandrels  [2]



37/

00Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for (by rolling B21B; by working or processing semi-finished sheet metal, profiles, tubes, or wire B21D, B21F; by casting B22; by material-removing machine tools B23; by welding, e.g. cladding or plating, B23K; by grinding or polishing B24; by electroforming C25D 1/00; by drawing or extruding, see the relevant groups); Manufacture of tubes of special shape  [2]

37/

02.of sheets

37/

04.of bars or wire

37/

06.of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes (bending sheets for making tubes B21D 5/00; seaming by folding B21D 39/02)

37/

08..Making tubes with welded or soldered seams (involving only a soldering or welding operation B23K)

37/

083...Supply, or operations combined with supply, of strip material

37/

087...using rods or strips of soldering material

37/

09...of coated strip material

37/

10..Making tubes with riveted seams

37/

12..Making tubes or metal hoses with helically arranged seams

37/

14..Making tubes from doubled flat material

37/

15..Making tubes of special shape; Making the fittings

37/

16...Making tubes with varying diameter in longitudinal direction

37/

18....conical tubes

37/

20...Making helical or similar guides in or on tubes without removing material, e.g. by drawing same over mandrels, by pushing same through dies

37/

22...Making finned or ribbed tubes by fixing strip or like material to tubes (making heat exchangers B21D 53/02)

37/

24....annularly-ribbed tubes

37/

26....helically-ribbed tubes

37/

28...Making tube fittings for connecting pipes, e.g. U-pieces

37/

29....Making branched pieces, e.g. T-pieces

37/

30..Finishing tubes, e.g. sizing, burnishing


43/

00Devices for cleaning metal products combined with or specially adapted for use with machines or apparatus provided for in this subclass

43/

02.combined with or specially adapted for use in connection with drawing or winding machines or apparatus

43/

04..Devices for de-scaling wire or like flexible work


Auxiliary operations used in connection with metal working without essentially removing material


45/

00Separating mandrels from work or vice versa


47/

00Winding-up, coiling or winding-off metal wire, metal band or other flexible metal material characterised by features relevant to metal processing only (coiling wire into particular forms B21F 3/00; hot coilers in connection with heat-treatment apparatus C21D 9/68)

47/

02.Winding-up or coiling

47/

04..on or in reels or drums, without using a moving guide (reels or drums B21C 47/28)

47/

06...with loaded rollers, bolts, or equivalent means holding the material on the reel or drum

47/

08..without making use of a reel or drum, the first turn being formed by a stationary guide

47/

10..by means of a moving guide

47/

12...the guide moving parallel to the axis of the coil (B21C 47/14 takes precedence)

47/

14...by means of a rotating guide, e.g. laying the material around a stationary reel or drum

47/

16.Unwinding or uncoiling

47/

18..from reels or drums

47/

20...the unreeled material moving transversely to the tangent line of the drum, e.g. axially, radially

47/

22..Unwinding coils without reels or drums

47/

24.Transferring coils to or from winding apparatus or to or from operative position therein; Preventing uncoiling during transfer

47/

26.Special arrangements with regard to simultaneous or subsequent treatment of the material

47/

28.Drums or other coil-holders (gripping means B21C 47/32)

47/

30..expansible or contractible

47/

32.Tongs or gripping means specially adapted for reeling operations

47/

34.Feeding or guiding devices not specially adapted to a particular type of apparatus


49/

00Devices for temporarily accumulating material


51/

00Measuring, gauging, indicating, counting, or marking devices specially adapted for use in the production or manipulation of material in accordance with subclasses B21B to B21F


  
 

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